Update README
Update README

Update Release Notes section and add a screenshot already showing the
Server Console.

PhilippRo/vscode-janus-debug,otris/vscode-janus-debug,tineheller/vscode-janus-debug,bkircher/vscode-janus-debug,tineheller/vscode-janus-debug,otris/vscode-janus-debug,PhilippRo/vscode-janus-debug,bkircher/vscode-janus-debug